EP4189775A2 - Radarreflektor zur reflexion von radarstrahlung und system zur steuerung eines automatisierten betriebs eines kraftfahrzeugs - Google Patents
Radarreflektor zur reflexion von radarstrahlung und system zur steuerung eines automatisierten betriebs eines kraftfahrzeugsInfo
- Publication number
- EP4189775A2 EP4189775A2 EP21745737.3A EP21745737A EP4189775A2 EP 4189775 A2 EP4189775 A2 EP 4189775A2 EP 21745737 A EP21745737 A EP 21745737A EP 4189775 A2 EP4189775 A2 EP 4189775A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- radar
- radar reflector
- reflector
- central axis
- reflection element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
- G01S13/75—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems using transponders powered from received waves, e.g. using passive transponders, or using passive reflectors
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D1/00—Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots
- G05D1/02—Control of position or course in two dimensions
- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0257—Control of position or course in two dimensions specially adapted to land vehicles using a radar
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/411—Identification of targets based on measurements of radar reflectivity
- G01S7/412—Identification of targets based on measurements of radar reflectivity based on a comparison between measured values and known or stored values
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/3208—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used
- H01Q1/3233—Adaptation for use in or on road or rail vehicles characterised by the application wherein the antenna is used particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions [2D], e.g. paraboloidal
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/04—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
- H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9316—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles combined with communication equipment with other vehicles or with base stations
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9329—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles cooperating with reflectors or transponders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/40—Means for monitoring or calibrating
- G01S7/4052—Means for monitoring or calibrating by simulation of echoes
- G01S7/4082—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder
- G01S7/4095—Means for monitoring or calibrating by simulation of echoes using externally generated reference signals, e.g. via remote reflector or transponder the external reference signals being modulated, e.g. rotating a dihedral reflector or modulating a transponder for simulation of a Doppler echo
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/415—Identification of targets based on measurements of movement associated with the target
Definitions
- Radar reflector for reflecting radar radiation and system for controlling automated operation of a motor vehicle
- the invention relates to a radar reflector for reflecting radar radiation and a system for controlling automated operation of a motor vehicle, comprising at least one such radar reflector and the motor vehicle.
- Motor vehicles for example commercial vehicles, are known from practice which are designed to carry out a fixed, predefined sequence of driving maneuvers in an automated manner.
- Automated commercial vehicles of this type are mainly used in an area separated from general road traffic, for example in a construction site area. In these construction site areas in particular, it may be necessary to change the route at short notice.
- the task here is how a sequence of driving maneuvers to be carried out automatically by the motor vehicle can be specified and/or changed by a worker on site as easily as possible.
- beacons for bi-directional communication with other beacons to exchange context-dependent travel information to support the autonomous operation of the vehicle.
- the travel information can include instructions for action, such as an advantageous detour if there is a roadblock due to an accident or a roadblock.
- Such instructions for action can be preset or pre-programmed and can already be found in a beacon or in the operating system of the autonomous vehicle, or can be made available to the autonomous vehicle.
- a disadvantage of the beacons used is that they are usually difficult to handle for workers on site due to the lack of expert knowledge, e.g. B. in a construction area the beacons to changed conditions, z. B. to change the route and the preferential instructions to adapt.
- radar reflectors for reflecting radar radiation for radar applications are known from the prior art, ie devices that have a particularly strong echo signal produce.
- radar reflectors can have at least one reflection element, which can be rotated about a central axis of the radar reflector, for reflecting radar radiation.
- the known radar reflectors are indeed robust and are characterized by a simple handling environment, but are generally less suitable for specifying more complex instructions for automated driving maneuvers to be carried out by motor vehicles.
- the object of the invention is therefore to provide an improved technology that can be easily adapted to the local conditions and by means of which radar signals can be transmitted to a motor vehicle, preferably for the automated operation of the motor vehicle.
- a radar reflector for reflecting radar radiation which comprises at least one reflection element, which can be rotated about a central axis of the radar reflector, for reflecting radar radiation. At least part of the radar radiation incident on the radar reflector is reflected or thrown back by the reflection element, which can be rotated about the central axis.
- the reflection element can have a suitable reflecting surface, for example, with a surface material or a coating that preferably has a higher degree of reflection than the surface of the other components of the radar reflector.
- the radar reflector also includes an adjustment device for changing and/or parameterizing a characteristic of a radar echo of the radar reflector, by means of which at least one of the following parameters can be changed: an angular velocity w of a rotational movement of the at least one reflection element about the central axis, an effective reflecting surface s of the at least one reflection element for radar radiation, and a mounting position p of the at least one reflection element relative to the central axis.
- radar echo means the radiation reflected by the radar reflector.
- the fastening position p of the at least one reflection element relative to the central axis can include the radial distance of the at least one reflection element relative to the central axis and/or a position of the reflection element in the axial direction of the central axis.
- the adjustment device is designed so that with a current value of at least one of the parameters w, s and p can be changed in the setting device in order in this way to change a characteristic of the radar echo generated by the radar reflector in response to incident radar radiation.
- a changed characteristic of the radar echo means that the signal characteristic, ie the signal properties of the radar echo have changed from the point of view of a receiver of the radar echo, even if the emitted radar radiation or the radar radiation impinging on the radar reflector has remained unchanged.
- a characteristic reflection behavior can thus be generated by means of different values of w, s and p by means of the setting device.
- Such a radar reflector whose characteristic radar echo can be changed, is particularly advantageous in order to use the radar echo generated to specify instructions, preferably driving maneuver commands, for the automated operation of motor vehicles if a specific characteristic radar echo is assigned a predetermined instruction, preferably driving maneuver command, on the vehicle side.
- the motor vehicle can be designed to automatically carry out a predetermined sequence of driving maneuvers, in particular as a function of received radar echoes.
- d. H. are coded by the respectively set values of the parameters w, s and p and the correspondingly generated characteristic of the radar echo.
- the radar reflector is preferably a mobile, z. B. portable or mobile running radar reflector, which facilitates positioning at different locations.
- the radar reflector is preferably a passive radar reflector.
- At least two of the parameters w, s and p can be changed by means of the setting device in order to change and/or parameterize the characteristic of the radar echo of the radar reflector.
- All three parameters w, s and p can preferably be changeable in order to change and/or parameterize the characteristic of the radar echo of the radar reflector.
- a specific value tuple of the parameters w, s and p is assigned to a specific characteristic radar echo that can be set by means of the setting device.
- a characteristic reflection behavior can be generated by different values of w, s and p. In this way, a particularly large Generate a number of different characteristic radar echoes using relatively simple design measures, which reduces the technical effort.
- the setting device can comprise a number of setting components, each of which is provided for setting one of the parameters w, s and p.
- a radial distance of the at least one reflection element from the central axis can be adjusted by means of the adjustment device in order to adjust the fastening position p.
- the radial distance of the reflecting element influences the radar echo generated by the radar reflector.
- the setting device for setting the radial distance can have at least one support arm extending in the radial direction relative to the central axis.
- the radial direction is a direction perpendicular to the central axis direction.
- the support arm can be designed as a telescopic arm and carry the reflection element at its free end. It is conceivable, for example, that the telescopic arm can be locked in certain extension positions.
- the reflection element can be mounted so that it can be displaced in the radial direction on the support arm.
- the reflection element can be mounted, for example, in a lockable guide rail on the support arm.
- a position in the axial direction of the central axis of the at least one reflection element can be set using the setting device.
- the adjusting device is designed to change a relative distance between the reflection elements and one another in the axial direction of the central axis. This leads to an easily recognizable change in the radar echo characteristic generated by the radar reflector.
- the adjustment device for adjusting the position in the axial direction of the central axis can have a guide mechanism, by means of which the at least one reflection element is movably mounted along the central axis.
- the guide mechanism can be designed as a guide rail or carriage along which or in which the at least one reflection element can be locked in different positions. The setting of different characteristic radar echoes is thus made possible in a structurally simple manner.
- the adjustment device can include a plurality of insertion, latching and/or clamping positions along the central axis, to which the at least one reflection element can be selectively attached directly or indirectly.
- the plug-in, locking and / o the terminal positions can, for. B. via clamping screws, locking pins, locking pins be reali Siert, which engage in corresponding holes, threaded holes, etc. and set the min at least one reflective element along the central axis. The setting of different characteristic radar echoes is thus made possible in a structurally simple manner.
- the radar reflector can also have a drive motor for generating a rotation of the at least one reflection element about the central axis.
- the drive motor can, for. B. be designed as an electric motor.
- the setting device can have an operating element or an operating interface for controlling the drive motor, by means of which or via which the angular velocity w can be set continuously or in steps.
- the control element can be designed, for example, as a toggle switch or rotary knob.
- the operating element preferably has a scale, by means of which the angular velocity caused at the reflection element or the characteristic of the radar echo caused or the transmitted driving maneuver command can be read off. This further simplifies the adjustment and generation of the desired radar echo.
- the concept of effective reflecting surface s is used in analogy to the concept of radar cross section, which is also widely used in radar technology, and designates the effective surface for reflecting incoming radar radiation.
- the effective reflecting surface depends, for example, on the size of the reflecting surface of the reflective element, its surface material and coating, or the geometric alignment of the reflecting surface in relation to the incident radar radiation.
- the adjustment device is also designed and/or has means for changing the effective reflecting surface s in a targeted manner in order in this way to be able to change the characteristics of the radar echo.
- the setting device for setting the effective reflecting surface s can comprise a holder, by means of which a pivoting position of the reflection element can be changed about the radial direction.
- the Re flexion element z. B. be brought from a substantially vertical position with respect to a Ra dialebene in a tilted position in which the effective reflecting surface s is smaller.
- the bracket can z. B. be designed as a lockable angle hinge.
- the setting device for setting the effective reflecting surface s can comprise a covering cap for selective attachment to a reflecting surface of the reflection element, by means of which part of the reflecting surface can be covered.
- the covering cap is made of a material that does not reflect radar radiation, or at least reflects it more weakly than the reflecting surface of the reflecting element, so that the effective reflecting surface of the reflecting element becomes smaller overall.
- the cover cap can be attached to the reflecting surface, for example, by means of snap fasteners or Velcro. This aspect enables a particularly simple, constructive embodiment of the proposed radar reflector and in this respect has cost advantages.
- the setting device for setting the effective reflecting surface s can comprise a plurality of reflection elements with different effective reflecting surfaces s.
- these can be designed with differently sized reflecting surfaces or reflecting surfaces made of different materials and can be mounted interchangeably on the radar reflector. In this way, a particularly rapid adjustment of the characteristic of the radar echo is made possible.
- the radar reflector can comprise a base body which can be rotated about the central axis of the radar reflector and at least one support arm which is fastened to the base body and extends in the radial direction relative to the central axis and which carries the reflection element.
- the body can z. B. cylinder, post or pylon-shaped. This further simplifies the structure of the radar reflector.
- the central axis is particularly preferably a vertical axis. An embodiment as a horizontal axis is also possible, for example.
- a plurality of support arms can be attached to the base body, each carrying a reflection element, preferably the support arms, viewed in the circumferential direction of the base body, are arranged equidistantly from one another.
- the support arms can be distributed evenly over the circumference of the base body. This can increase the signal strength of the radar echo.
- exactly two support arms can be attached to the base body, each carrying a reflection element.
- the support arms can preferably be offset from one another by 180° as seen in the circumferential direction of the base body and can therefore be arranged opposite one another in relation to the central axis.
- the adjustment device can be designed in such a way that an axial distance between the support arms can be changed in the direction of the central axis.
- a distance between the support arms as seen from one another in the circumferential direction of the base body can be variably adjusted so that these z. B. instead of 180 ° offset from each other, only 90 ° offset from each other are arranged. The setting of different characteristic radar echoes is thus made possible in a structurally simple manner.
- the adjustment device for setting the axial spacing of the support arms can have a guide mechanism, by means of which the support arms are movably mounted along the central axis.
- the guide mechanism can be designed as a guide rail or guide carriage, along which the at least one reflection element can be locked in different positions. The setting of different characteristic radar echoes is thus made possible in a structurally simple manner.
- the adjustment device for adjusting the axial spacing and/or the spacing of the support arms from one another in the circumferential direction of the base body can comprise a number of plug-in, latching and/or clamping positions along the central axis and/or in the circumferential direction of the base body, at which the support arms are selectively attachable. In this way, a particularly rapid adjustment of the characteristic of the radar echo is made possible.
- the radar reflector can have markings, which are provided on the base body at different positions in the axial direction and/or on the at least one support arm at different positions in the radial direction, for marking selectively adjustable positions of the reflection elements by means of the at least one support arm.
- the selectively adjustable positions can also z. B. certain characteristics of the radar echo can be set so that they are assigned certain driving maneuver commands, which z. B. can be documented by an accompanying manual. This advantageously enables the characteristic radar echo to be changed particularly quickly and easily.
- the radar reflector can also have an at least partially evacuated housing, preferably a tube, more preferably a plastic tube, which encloses the base body, the at least one support arm and the at least one reflection element.
- the concept of partial evacuation means that the air pressure inside the enclosure is lower than the atmospheric pressure outside the enclosure. The operation of the radar reflector is therefore low-resistance and is protected from environmental influences, which reduces the susceptibility to errors.
- the radar reflector can also have a photovoltaic module arranged on a rear side of the at least one reflection element or on the housing for the power supply of the radar reflector.
- the photovoltaic module can be designed in a manner known per se to convert solar energy into electrical current to supply energy to the radar reflector.
- the radar reflector can also have a communication interface for wireless data communication, the setting device being designed to change the angular velocity w and/or switch off the radar reflector depending on a control command received via the communication interface.
- the control command can be converted into control voltages for the drive motor designed as an electric machine by means of the communication interface and cause a change in the angular velocity. This simplifies the operation of the setting device.
- the proposed radar reflector offers the advantage that the characteristic radar echo can be changed or adapted by means of simple design measures or adjustments to the operating parameters of the radar reflector. In this respect, the adaptation does not require any expert knowledge.
- the proposed radar reflector is therefore particularly advantageous for use in environments where the local conditions testify short-term adjustments to the automated operation of motor vehicles require, such as in construction areas, with driving maneuver commands for the motor vehicle are to be specified by means of radar reflectors.
- a plurality of radar reflectors which are basically of the same structural design, it is possible to use the targeted Setting the above parameters, e.g. B. can also implement a complex path over a plurality of radar reflectors lined up one after the other.
- the radar reflectors which are identical in their basic configuration, offer advantages in terms of manufacturing costs compared to radar reflectors with different designs. Overall, there is a significantly reduced technical effort in the implementation and adaptation of automated operation of motor vehicles.
- a system for controlling automated operation of a motor vehicle is provided.
- the system includes at least one radar reflector as described in this document, i. H. comprising an adjustment device for changing and/or parameterizing a characteristic of a radar echo of the radar reflector.
- the system also includes a motor vehicle that has a radar sensor and is designed to automatically carry out a predetermined sequence of driving maneuvers that can be predetermined at least in part by a received radar echo.
- the radar sensor can z. B. be designed to send radar radiation and receive a radar echo and z. B. to a control device of the motor vehicle.
- the motor vehicle is also designed to receive a radar echo from the at least one radar reflector, e.g. B. by means of the radar sensor, and to determine a characteristic of the radar echo, z. B. by evaluating and comparing the received radar echo with stored parameters.
- a radar echo from the at least one radar reflector, e.g. B. by means of the radar sensor, and to determine a characteristic of the radar echo, z. B. by evaluating and comparing the received radar echo with stored parameters.
- the motor vehicle is also designed to identify the radar reflector using an association stored in a database between different characteristics of the radar echo and associated identifiers for identifying the radar reflector.
- the motor vehicle can be designed to select a driving maneuver from a set of predetermined driving maneuvers and to carry it out automatically as a function of the identification of the radar reflector.
- the automated operation of the motor vehicle can be achieved simply by lining up the driving maneuver commands.
- a characteristic reflection behavior can be generated by different values of w, s and p, which can be set using the setting device on the radar reflector.
- the motor vehicle can be designed to determine at least one of the following variables to determine the characteristic of the radar echo based on the received radar echo: a change over time, preferably a so-called flashing, of the radar echo, a tan measured using the Doppler effect gential speed amount of the at least one reflection element, a degree of reflection or an effective reflecting surface s of the radar reflector, and a tangential speed difference of the reflection elements measured via the Doppler effect.
- the change in the radar echo over time and a tangential velocity value of the at least one reflection element measured via the Doppler effect depends, for. B. from the angular velocity w of the rotational movement of the at least one reflection element about the central axis.
- a changed effective reflecting surface s of at least one reflection element can be detected via the power density received by the radar sensor of the motor vehicle.
- Blinking can e.g. B. denote an increase and decrease in the strength of the radar echo.
- FIG. 1 shows a system for controlling automated operation of a motor vehicle according to one embodiment
- FIG. 2 shows a radar reflector according to a first embodiment
- FIG. 3 shows a partial view of a radar reflector according to a further embodiment
- FIG. 4 shows a radar reflector according to a further embodiment
- FIG. 5 shows a radar reflector according to a further embodiment
- FIG. 6 shows a radar reflector according to a further embodiment.
- FIG. 2 shows a highly schematic representation of a radar reflector 1 for reflecting radar radiation according to a first embodiment.
- the reference numeral 1 designates a radar reflector in all the embodiments of FIGS. 2 to 6, which is designed differently depending on the embodiment and variant.
- the radar reflector 1 comprises a base body 19 which can be rotated about a central vertical axis 4 of the radar reflector 1, two support arms 8 which are fixed in a torque-proof manner to the base body 19 and extend in a radial direction 100 relative to the central axis 4, each of which has a reflection element 5 at its free end for carry radar radiation.
- the reflection element 5 can also be referred to as a radar reflector wing.
- the support arms 8 and the reflection elements 5 are - seen in the circumferential direction of the base body 19 - arranged equidistant to each other, d. H. 180 ° from each other and thus arranged in relation to the central axis 4 ge opposite.
- a mounting position p of the reflection elements 5 relative to the central axis 4 is determined by the radial distance 10 of the reflection elements 5 to the central axis 4 and by the axial position, i. H. the position in the axial direction 200 of the reflection elements 5, in particular by the relative axial distance 11 in the axial direction 200 of the two reflection elements 5 to one another.
- the base body 19 is in drive connection with a drive motor 15, z. B. an electric motor, via which the base body and thus the radar reflector 1 can be rotated about the central vertical axis 4 w denotes the angular velocity of the rotational movement about the axis 4.
- the reflection elements 5 are designed to reflect radar radiation 2 and have a material suitable for reflecting radar radiation.
- the extent to which incoming radar radiation 2 is reflected back by the reflection elements 5 depends on the effective reflecting surface s of the reflection elements 5 .
- the effective reflecting surface s is used in analogy to the term radar cross section, which is widespread in radar technology.
- the effective reflecting surface s depends, among other things, on the size of the side surfaces and their surface material or coating.
- the characteristic reflection behavior of the radar reflector 1, i. H. the characteristic of the radar echo depends on the values of the parameters w, s and p.
- B. the characteristic reflection values of the reflection elements 5 the strength of the radar echo.
- the radar echo received by a radar sensor is also influenced by the geometric arrangement p of the reflection elements 5, i. H. the mounting position p of the reflection elements 5 relative to the central axis, e.g. B. the axial distance 11 and/or the radial distance 11 of the reflection elements 5.
- the characteristic change in the reflection values over time also depends on the angular velocity w, with which the effective radar cross section changes through the Rotational movement about the axis 4 changes over time.
- the reference numerals 6 and 9 in Figure 2 designate the tangential speeds of the two reflection elements 5.
- the values of the rotational speed w, the effective reflecting surface s, the fastening position p, the axial distance 11 and the radial distance 11 of the reflection elements 5 thus lead to a characteristic reflection behavior, ie a characteristic radar echo, of the radar reflector 1.
- a characteristic reflection behavior ie a characteristic radar echo
- a motor vehicle 23 with a radar sensor 24 can thus, by evaluating the received radar echo 3 (cf. representation in Figure 1) decorate a specific radar reflector 1 based on its characteristic reflection behavior identifi when in the vehicle, z. B.
- a corresponding assignment between an identifier of the radar reflector 1 and the radar reflector 1 associated characteristic radar echoes 3 was previously stored, which is described in more detail below in connection with FIG. It has already been stated above that a special feature of the radar reflector 1 according to the invention is that the characteristic of the radar echo 3 of the radar reflector 1 can be changed in a targeted manner.
- the radar reflector 1 includes an adjustment device 7, by means of which at least one of the following parameters w, s and p can be changed.
- the setting device 7 can comprise several embodiments or setting components 7a, 7b, 7c and 7d, which are each provided for setting one of the parameters w, s and p.
- the adjusting device 7 shown in the figures can comprise one, several or all of the embodiments 7a, 7b, 7c and 7d.
- the relative distance 11 between the two reflection elements 5 in the axial direction 200 can be changed by means of the adjusting device 7a, here z. B. by adjusting the position in the axial direction 200 of the right-hand reflection element 5.
- the radial distance 10 of the two reflection elements 5 from the central axis 4, i. H. the position of the reflection elements 5 in the radial direction 100, can be changed, this being shown in FIG. 2 for the sake of clarity only for the right-hand reflection element 5.
- the angular velocity w of the rotational movement of the reflection elements 5 can be set by means of the setting device 7c.
- the setting device 7c includes a control element 16 for controlling the drive motor 15 in order to set the angular velocity w of the rotational movement of the reflection elements 5, e.g. B. gradually adjust.
- a pivoting position of the two reflection elements 5 about the radial direction 100 can be changed by means of the adjusting device 7d, this being shown in FIG. 2 again only for the left-hand reflection element 5 for the sake of better clarity.
- FIGS 3 to 6 show schematic representations of further variants of the radar reflector 1.
- the adjusting device 7b is designed here, for example, as a telescopic arm 12 in order to form the support arms 8 of the reflection elements 5 .
- the radar reflector 1 can be identified on the basis of the tangential speed value 9 .
- the first embodiment of the setting device 7d includes a holder 17 with which the reflection elements are pivotally mounted on one of the support arms 8.
- the pivoting position of the reflection elements 5 can be changed about the radial direction 100.
- the effective area for reflecting the incident radar radiation 2 changes.
- the effective reflecting area s can thus be changed via the pivoting angle.
- the holder 17 can include a lock in order to fix the reflection elements 5 in the desired pivoted position.
- the second embodiment of the adjustment device 7d includes a covering cap 18 which can be attached to the reflection element 5 as desired.
- the cover cap 18 is detachably attached to the right-hand reflection element 5 here.
- the cap 18 has an upper surface that reflects radar radiation 2 less than the reflecting surface of the right-hand reflective element 5.
- Targeted adjustment of the pivoting position of the reflection elements 5 and/or application of the cover caps 18 to the two reflection elements 5 can thus be used to generate characteristic radar echoes 3 for identifying the radar reflector 1 .
- holder 17 and the covering cap 18 in FIG. 4 are only shown on one of the reflection elements 5 for the sake of better clarity.
- a holder 17 for changing the pivoting position can be provided on both reflection elements 5 in each case.
- the holders 17 and the covering caps 18 can be used both together and individually.
- Fig. 5 illustrates another possible embodiment of the setting device 7 for setting an axial distance 11 between the reflection elements 5.
- the adjustment device 7a has the guide mechanism 13, e.g. B. a guide rail by means of which the right-hand reflection element 5 is mounted displaceably along the central axis 4 of the sector 1 Radarreflek.
- the setting device 7a alternatively or additionally includes a plurality of plug-in, latching and clamping positions 14 along the central axis 4, to which the at least one reflection element 5 can be selectively attached directly.
- FIG. 6 shows a further embodiment of the radar reflector 1.
- the radar reflector 1 has a housing 20 which encloses the base body 19, the two support arms 8 and the reflection elements 5, is transparent to radar radiation 2 and is at least partially evacuated and is designed as a plastic tube.
- the inner volume of the order housing 20 has a lower air pressure compared to the environment. The operation of the radar reflector 1 can thus be particularly low-resistance and protects against environmental influences.
- a photovoltaic module 21 for supplying power to the radar reflector 1 is arranged on the housing 20 .
- Photovoltaic module 21 is designed in a manner known per se for converting solar energy into electricity and is used for self-sufficient power supply to drive motor 15, which is designed as an electrical machine.
- the setting device 7c for changing the angular velocity w includes a wireless communication data interface 22, which is designed to receive control commands for controlling the drive motor 15 and thus for setting the angular velocity w. Furthermore, the radar reflector 1 can be switched on and off by means of the adjustment device 7c.
- the exemplary embodiments of the radar reflector 1 described above are thus characterized in that means are provided in the form of the setting device 7 by means of which the characteristic of the radar echo 3 of the radar reflector 1 can be changed in a targeted manner by a value tuple of the parameters w, s and p is changed.
- Such a radar reflector 1 is advantageously used in systems for controlling automated operation of a motor vehicle 23. This is described in FIG. 1 by way of example.
- Figure 1 shows a system 25 for controlling an automated operation of a Motor vehicle 23 according to one embodiment, wherein radar reflectors 1, T as described above are used.
- radar radiation 2 is reflected by a radar reflector 1, T, generating characteristic radar echoes 3, 3'.
- the radar echoes 3, 3' are used on the vehicle side in a motor vehicle 23 designed for automated operation, e.g. B. driving maneuvers for automated operation of the motor vehicle 23 are derived.
- a specific characteristic Ra darecho 3 stands for a specific driving maneuver that is to be carried out automatically by the motor vehicle 23 . The assignment as to which characteristic radar echo 3 corresponds to which driving maneuver has been stored in motor vehicle 23 beforehand.
- the assignment is z. B. also documented in the form of a work manual, based on which a worker of the z. B. on a construction site the motor vehicle 23 wants to specify a certain sequence of driving maneuvers, can determine how he must adjust the radar reflectors 1, T by means of the adjusting device 7 so that they each produce a specific characteristic cal reflection behavior that corresponds to the driving maneuver command, the the worker wants to pretend.
- a specific value tuple of the parameters w, s and p can be assigned to a specific driving maneuver command. Accordingly, the worker can use the radar reflector 1 based on specific specifications using the adjustment device 7, z. B.
- the automated operation of the motor vehicle 23 is in this respect at least partially (remotely) controlled by the radar reflectors 1, 1' set up in a specific order.
- a desired route and behavior of the motor vehicle 23 can be specified in this way simply by setting up such mobile radar reflectors 1, T and can also be changed and adapted quickly and easily by changing the setup and/or the characteristic radar echo 3, 3'.
- the system 25 comprises only two radar reflectors 1, T, merely as an example. These differ in that they have been set to different value tuples of the parameters w, s and p by means of the setting device, so that these different characteristic radar echoes 3, 3' generate.
- the system 25 also includes a motor vehicle 23, which has a radar sensor 24 and is designed to automatically carry out a predefined sequence of driving maneuvers.
- the driving maneuvers are at least partially specified by the radar echoes 3, 3' of the radar reflectors 1, T. This means that the motor vehicle 23 is designed to carry out a correspondingly assigned driving maneuver when it receives a specific radar echo 3, 3'.
- the radar sensor 24 is designed to transmit radar radiation 2 and to receive radar echoes 3, 3'. In the embodiment shown, the radar radiation 2 is thrown back by way of example from radar reflector 1 in a characteristic manner, generating the radar echo 3 .
- the radar sensor 24 is also designed to transmit the received radar echo 3 to a control device 26 of the motor vehicle 23 .
- the control device 26 is designed to determine a characteristic of the radar echo 3 .
- control device 26 can determine at least one of the following variables: a change over time, preferably blinking, in radar echo 3, a tangential velocity value of the at least one reflection element measured using the Doppler effect 5, a degree of reflection or an effective reflecting area s of the radar reflector, and a tangential speed difference of the reflecting elements 5 measured via the Doppler effect.
- a change over time preferably blinking
- a degree of reflection or an effective reflecting area s of the radar reflector a degree of reflection or an effective reflecting area s of the radar reflector
- a tangential speed difference of the reflecting elements 5 measured via the Doppler effect are influenced by different values of w, s and p.
- the assignment between different characteristics of the radar echoes 3, 3' and identifiers of the radar reflectors 1, T and/or direct driving maneuvers is stored in a database.
- the control device 26 uses the received radar echo 3 and the assignment stored in the database to identify the radar reflector 1 . In the example shown, the control device 26 assigns the radar echo 3 to the radar reflector 1 .
- the motor vehicle 23 is designed to select a driving maneuver from a set of predetermined driving maneuvers as a function of the identification of the radar reflector 1, V and to carry it out automatically.
- the motor vehicle 23 first approaches the radar reflector 1 and, in the manner described above, derives a driving maneuver for automated operation.
- driving maneuver z. B. certain, with the motor vehicle 23 itself or with attachments or ancillary units of the motor vehicle 23 are understood by feasible standard maneuvers, preferably instructions for driving maneuvers, for local navigation and traffic sign information.
- the associated driving maneuver is selected and carried out by the motor driving tool 23 from the infection of the radar reflector 1 only by way of example, driving tangentially past the radar reflector 1 .
- the motor vehicle 23 By driving tangentially past the radar reflector 1, the motor vehicle 23 approaches the radar reflector V.
- the motor vehicle 23 receives a radar echo 3', the characteristics of which differ from the characteristics of the previously received radar echo 3.
- the motor vehicle 23 recognizes that the radar echo 3' is being reflected by another radar reflector V, here the radar reflector 3', or that another driving maneuver must now be carried out for automated operation.
- the derived driving maneuver causes the motor vehicle 23 to initiate cornering, merely by way of example.
- motor vehicle 23 could accordingly come into the vicinity of another radar reflector V (not shown here) and derive the next driving maneuver from its identification, etc.
- the sequential sequence of derived driving maneuvers results in fully automated operation of motor vehicle 23 in the exemplary embodiment shown
- a worker on a construction site can thus specify a sequence of desired driving maneuvers by sequentially setting up several radar reflectors 1, 1', which are then carried out by a correspondingly equipped motor vehicle 23.
- control device 100 radial direction 200 axial direction
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Computer Security & Cryptography (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Radar Systems Or Details Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020120181.8A DE102020120181A1 (de) | 2020-07-30 | 2020-07-30 | Radarreflektor zur Reflexion von Radarstrahlung und System zur Steuerung eines automatisierten Betriebs eines Kraftfahrzeugs |
| PCT/EP2021/069598 WO2022023039A2 (de) | 2020-07-30 | 2021-07-14 | Radarreflektor zur reflexion von radarstrahlung und system zur steuerung eines automatisierten betriebs eines kraftfahrzeugs |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4189775A2 true EP4189775A2 (de) | 2023-06-07 |
| EP4189775C0 EP4189775C0 (de) | 2025-09-03 |
| EP4189775B1 EP4189775B1 (de) | 2025-09-03 |
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ID=77042936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21745737.3A Active EP4189775B1 (de) | 2020-07-30 | 2021-07-14 | Radarreflektor zur reflexion von radarstrahlung und system zur steuerung eines automatisierten betriebs eines kraftfahrzeugs |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12510650B2 (de) |
| EP (1) | EP4189775B1 (de) |
| DE (1) | DE102020120181A1 (de) |
| WO (1) | WO2022023039A2 (de) |
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|---|---|---|---|---|
| CN115407316A (zh) * | 2022-08-31 | 2022-11-29 | 歌尔科技有限公司 | 测试设备 |
| DE102022132299A1 (de) * | 2022-12-06 | 2024-06-06 | Zf Cv Systems Europe Bv | Verfahren und Vorrichtung zur drahtlosen Übermittlung eines Steuerbefehls an eine Sende- und Empfangseinrichtung |
| DE102024204826A1 (de) * | 2024-05-24 | 2025-11-27 | Continental Automotive Technologies GmbH | Verfahren zur Identifikation eines Fahrzeugs in einem Verkehrsraum |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108427103A (zh) * | 2018-04-20 | 2018-08-21 | 中铁第四勘察设计院集团有限公司 | 一种用于地基雷达回波信号标定的角反射器 |
| CN210835211U (zh) * | 2019-08-07 | 2020-06-23 | 安徽维普电子科技有限公司 | 一种角反射器旋转装置 |
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|---|---|---|---|---|
| US2543130A (en) * | 1946-07-03 | 1951-02-27 | Bell Telephone Labor Inc | Reflecting system |
| DE2929814C2 (de) * | 1979-07-23 | 1982-09-16 | Siemens AG, 1000 Berlin und 8000 München | Einrichtung zur Erzeugung von Dopplerechos |
| GB2291269B (en) | 1993-02-24 | 1996-05-29 | Ferranti Int Plc | Specular marker array |
| US5424737A (en) * | 1993-12-22 | 1995-06-13 | United Technologies Corporation | Communications retro-reflector |
| DE19707590C2 (de) | 1997-02-26 | 2000-12-14 | Bosch Gmbh Robert | Verfahren und Vorrichtung zur Justierung der Ausrichtung einer Strahlcharakteristik eines Entfernungssensors |
| GB0002294D0 (en) * | 2000-02-02 | 2000-03-22 | Jaguar Cars | Automotive radar elevation alignment |
| JP2008268088A (ja) * | 2007-04-24 | 2008-11-06 | Fujitsu Ten Ltd | 車載用レーダ装置の取付け角度調整用支援装置 |
| US12021162B2 (en) * | 2014-06-02 | 2024-06-25 | California Institute Of Technology | Ultralight photovoltaic power generation tiles |
| CN106662638B (zh) * | 2014-08-15 | 2019-06-25 | 罗伯特·博世有限公司 | 汽车雷达对准 |
| DE102014014892A1 (de) | 2014-10-13 | 2016-04-14 | Rheinmetall Air Defence Ag | Radarvorrichtung zur Detektion von unbemannten, langsam und tief fliegenden Flugobjekten |
| US10578713B2 (en) * | 2015-06-24 | 2020-03-03 | Panasonic Corporation | Radar axis displacement amount calculation device and radar axis displacement calculation method |
| WO2018217784A1 (en) | 2017-05-22 | 2018-11-29 | Chase Arnold | Bi-directional beacon information system |
| CN109387812A (zh) | 2017-08-07 | 2019-02-26 | 航天科工惯性技术有限公司 | 具有自动调节功能的insar角反射器装置 |
| CN111257843B (zh) * | 2017-10-20 | 2022-08-02 | 深圳市道通科技股份有限公司 | 汽车盲区雷达标定设备 |
| EP3671950A1 (de) * | 2018-12-20 | 2020-06-24 | Bombardier Inc. | Antennen/radom-anordnung |
| CN110308425A (zh) * | 2019-08-07 | 2019-10-08 | 安徽维普电子科技有限公司 | 一种角反射器旋转装置及其控制系统 |
-
2020
- 2020-07-30 DE DE102020120181.8A patent/DE102020120181A1/de active Pending
-
2021
- 2021-07-14 US US18/018,838 patent/US12510650B2/en active Active
- 2021-07-14 EP EP21745737.3A patent/EP4189775B1/de active Active
- 2021-07-14 WO PCT/EP2021/069598 patent/WO2022023039A2/de not_active Ceased
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108427103A (zh) * | 2018-04-20 | 2018-08-21 | 中铁第四勘察设计院集团有限公司 | 一种用于地基雷达回波信号标定的角反射器 |
| CN210835211U (zh) * | 2019-08-07 | 2020-06-23 | 安徽维普电子科技有限公司 | 一种角反射器旋转装置 |
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| Title |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP4189775C0 (de) | 2025-09-03 |
| US20230358878A1 (en) | 2023-11-09 |
| DE102020120181A1 (de) | 2022-02-03 |
| WO2022023039A3 (de) | 2022-03-24 |
| US12510650B2 (en) | 2025-12-30 |
| EP4189775B1 (de) | 2025-09-03 |
| WO2022023039A2 (de) | 2022-02-03 |
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